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Adam Lambert, Sauli Koskinen

Steve Granitz/WireImage

This is the kind of hit no singer wants.

American Idol runner-up Adam Lambert was arrested early Thursday morning in Helsinki after getting into a fight with his reality-star boyfriend, Finnish Big Brother winner Sauli Koskinen.

According to local media reports, the brawl began inside the gay bar DTM (Don't Tell Mama) at about 4 a.m., and the heated dispute eventually continued outside.

Several people attempted to break things up between the two, but they, in turn, were allegedly hit as well while trying to intervene.

Both Lambert and Koskinen were subsequently arrested on possible assault charges. After being questioned by police, they were later released.